NASA Marshall Space Flight Center · 2026

Artemis Flight Software Tooling

I implemented C++ simulation fixes and Python verification tools for the real-time Linux SLS hardware-in-the-loop environment.

Expanded technical stack

NASA Space Launch System rocket lifting off from the launch pad — Artemis II launch

Overview

NASA's ARTEMIS Space Launch System simulation environment reproduces mission behavior before flight. I addressed a cross-endian mismatch that prevented parameter checksum validation and built repeatable analysis for simulation data after flight-software changes.

My contribution

I reconstructed a byte-swapped auxiliary parameter structure from generated metadata before hashing, restoring checksum comparison without corrupting live flight-software data. I also built Sherlock analysis modules for MIL-STD-1553B and MIL-STD-1750A validity, launch sequencing, attitude hold, generated-file verification, and caution, warning, and abort behavior.

Challenge

The emulated ground and flight computers used different byte orders, so hashes over raw parameter bytes disagreed even when an I-Load was transmitted and applied correctly. I needed to restore the comparison without changing the parameter values used by flight software.

Technical approach

I implemented the C++ fix inside the real-time Linux SLS HIL environment, then developed Python modules that query simulation data and validate bus formats, launch-command acknowledgement and timing, planned windows, separation events, and quaternion-based attitude drift.

Result / outcome

I restored checksum validation and fault isolation in ARTEMIS. My broader verification work included more than 100 unit and integration tests plus documentation for future developers.

View internship presentation

Gallery / media

Selected artifacts

Rocket ascending against a clear blue sky — Artemis II launch

Standing at a NASA podium — At a NASA podium

Marshall interns gathered with Crew-11 astronauts for a group photograph — Marshall intern cohort with Crew-11 astronauts

Standing with two Crew-11 astronauts at a NASA event — With Crew-11 astronauts Zena Cardman and Kimiya Yui at a NASA event